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FLOOR.

Rounds a number down to the nearest multiple of significance.

SyntaxArgumentsExampleInteractive SandboxGeneratorCompatibilityFAQRelatedCheat Sheet
Category: Math & Arithmetic
ExcelExcel 365Excel 2021Excel 2019Google Sheets

How it works.

FLOOR rounds a numeric value down (toward zero) to the nearest multiple of significance you specify.

Formula syntax.

Standard Excel Notation
=FLOOR(number, significance)
Tip:Arguments wrapped in square brackets [like_this] are optional; all other arguments are required.

Formula arguments.

Every parameter accepted by the FLOOR function is detailed below.

numberRequired

The number to round down.

Example value: A2
significanceRequired

The multiple to round down to.

Example value: 1

Simple example.

Step-by-Step Scenario

Discounts - Round Down to 10s

Round prices down to the nearest multiple of 10.

Raw PriceDiscount Floor
28.75—
44.50—
Applied Formula
=FLOOR(A2, 10)
Expected Result:20

Evaluates FLOOR over the sample table cells, placing the verified output in cell B2.

Formula generator.

Full Generator Wizard

Customize the argument fields below to generate a tailored FLOOR formula ready to paste directly into your worksheet.

Generated FormulaReady to copy
=FLOOR()

Expected result behavior.

Returns number 20 based on sample evaluation criteria and active cell references.

Sample Output:20
Output Type:Numeric (Double/Integer)

Best Practices

  • Round billing times down to the nearest 15-minute or 30-minute block.

Common Mistakes

  • If the significance is zero, FLOOR returns #DIV/0!.
Compatibility Database

Platform & version compatibility.

Verified platform compatibility matrix based on actual spreadsheet calculation engine specifications.

Excel✓
Supported
Excel 365✓
Supported
Excel 2021✓
Supported
Excel 2019✓
Supported
Google Sheets✓
Supported
Microsoft Excel History & Version Availability

Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.

Google Sheets Compatibility Notes

100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.

Frequently asked questions.

Technical Q&A
Can I use FLOOR across different worksheets in Excel?↓

Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =FLOOR(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.

What is the most common reason for errors in FLOOR?↓

If the significance is zero, FLOOR returns #DIV/0!.

Does FLOOR work identically in Google Sheets?↓

Yes, FLOOR is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.